Furnace



(No Model.) 2 Sheets-Sheet 1.1.

P. MEYER an G. HARMS.

FURNACE.

No. 576,135. Patented Peb.2,1897. y

nnlltl (No Model.) 2 sheets-sheet 2.

v I. MEYER 8u G. HARMS.

A FURNACE.

" Inu@ W UNITED STATES 4PATENT OFFICE.

FRANK MEYER AND GEORGE HARHS, OF PEORIA, ILLINOIS.v

FU RNACE.

SPECIFICATION forming part of Letters Patent No. "576,135, datedFebruary 2, 1897. Application filed December l0, 1895. Serial No.571,692. (No model.)

To all whom, t may concern.-

Beit known that we, FRANK MEYER and GEORGE HARMS, citizens of the UnitedStates, residing at Peoria, in the county of Peoria and State ofIllinois, have invented certain new and useful Improvements in Furnaces;and we do hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same. v s

Our invention relates to certain new and useful improvements infurnaces, stoves, or other heaters by means of which we improve thegeneral efficiency of the same by providing a particular construction ofa part thereof. More particularly our invention relates to the fire-potof a furnace, stove, or other heating apparatus; and we have for ourobject to improve the efficiency and increase the durability of thatportion of a furnace, stove, or other heating apparatus to which it maybe applied; also to so form the fire-pot that airducts will be providedin the fire-pot lining to facilitate in the circulation of air aroundand in Contact with the fire-pot lining to equalize the temperature ofthe said lining or independent parts or sections thereof to prevent theburning` or warping of the same, and

to heat a body of air by passing it through said ducts and deliver .thesame properly distributed into the fire-pot at points above the burningfuel to facilitate in the burning of gas liberated by the combustion ofkthe fuel and the consumption of smoke and soot.

Our invention consists in the forming of a iire-pot of separate andindependent sections or parts bearinga detachable relation the one tothe other, so that portions of the fire-pot may be removed when desired,whether for the purpose of cleaning out the furnace or for replacingsections that have by long use become inefficient onV account of burningor otherV cause without having to take the furnace apart, and also inthe formation of the said sections to provide air-ducts around thefire-pot when the sections are put together and properly supportedwithin the furnace,` which amounts practically to the'addition offlanges to the ordinary fire-pot bearing between the outside wall of thesaid fire-pot lining and the inner wall of and the inside face'of a wallor cylinder within which the fire-pot is supported to promote thecirculation of air around the fire-pot, as has been previouslyspecified, of the particular and detailed formation of. the independentsections of the main body of the fire-potand the de` Fig. 2 is aperspective view of sections of the fire-pot, adapted when properlymatched to produce a doorway and airchamber under the doorway and forclosing theV ends of the air-ducts and facilitate in the properdisposition of the currents to cause them to circulate properly aroundthe fire-pot.

In the drawings, A refers to the cylinder or wall designed to inclosethe fire-pot.

B designates the sections of the complete device, that are uniform insize and alike in construction and adapted to be assembled, detachablycombined, in forming the {ire-pot. Each independent section isconstructed to form a segment of the complete circle describedby thewall of the fire-pot of which it is a part and has the proper lateralcurve through the main portion of the body thereof, adapting it to itwithin the ring so formed, the main portion of each independent'sectionbeingmade straight vertically and the top portion curved outwardly andfiared laterally to adapt it to the larger circle and the eX- tremeupper end thereof curved to forln a segment of the complete circledescribed by this portion of the fire-pot concentric with the circledescribed by the segments of the lower portions of the sections, eachsection being provided with flanges suitable for overlapping the meetingsections to facilitate in the more secure attachment of the parts toform the complete fire-pot, but in no way interfering with theirseparate attachment,

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C and C are rearwardly-extending flanges or extensions bearing at rightangles with the body of the segment and integral therewith and areadapted to bear against the inside face of the wall or cylinder A, asshown in Figs. l and 2, in such a manner that they will, in combinationwith the wall G, produce air-ducts between the sections and the wall,through which ducts air can be circulated around the fire-pot, asrequired, to prevent the sections B from burning and warping, and alsofor the purpose of heating the air and discharging it into the fire-potat points around the entire circumference thereof and above the body ofburning material being consumed in the fire-pot.

D is a section of our complete device'adapted to participate in theformation of an opening or doorway leading to the fire-pot, as shown inFigs. l and 2, and also adapted to aid in directing and circulating airthat is admitted through duct E, as shown by solid lines in Fig. l andby dotted lines in Fig. 2, or in any other suitable way. This sectionhas an integral vertical side portion D2, that is adapted to serve as aportion of the wall of the doorway, and a shorter portion D3, having anextension D4, that engages the lower extension C of the adjoiningsection. Said eX- tension DAl is inclined, so as to aid in directing thecurrent of air into the fire-chamber under the extension C. The upperextension C/ of the same adjoining section B is shorter than the lowerextension C, and thereby an opening is provided that allows air to passover the middle air-chute into the top chute and passage-way, fromwhence it is distributed through perforations in the curved top portionsof the sections B, as required, to promote combustion of the gas andsoot from the fuel within the fire-pot.

F is a section adapted in form to aid in producing a doorway and a chuteunder the doorway. It has integral vertical side portions F2 at its topcorresponding with the part D2 and also adapted to serve as a wall forthe doorway. Section F3 is a continuation of section F2 and closes thetwo lower ducts or passageways for air, produced by the sections B,having the lateral extensions C and C'.

F4 is a lateral extension that abuts against the edge of the extension Cof the adjoining section B and closes the end of the upper airduct, fromwhich the hot air is distributed to the fire in the fire-pot.

DGis a short section corresponding with sections B in all particularsexcept as to height, and it has the vertical side piece D7, that abutswith the vertical extension F2 of section F.

D8 is also a short section that matches with short section DG and abutsagainst the eXtension D3 from section D, and is provided with thefoot-piece d to assist in maintaining the side section firmly in place.These combined sections D6 and D8 assist in producing the opening ordoorway leading into the fire-pot.

H is a metal ring in concentric position with the cylinder A and issuitably supported therein, and serves as a support for the series ofsections B and the sections D and F and the short sections DG and D8,and also as a bottom for the lowerduct and air passage-way.

J represents a doorway to the fire-pot affixed to cylinder A.

K represents a grate in the bottom of the fire-pot in the same plane ofthe ring H and in concentric position therewith.

The sections B, D, D, D8, and F are preferably made of cast metal insuitable molds, but may be made of fire-clay or other suitable material.

The air-inlet duct E, opening into the pas- I sage-way underneath thedoorway t-o the firepot, supplies the air designed to circulate throughthe duct-s around the fire-pot and that is ultimately discharged throughthe perforations in the upper portions of the sections into the nre-pot.

In applying the sections B, D, D, D8, and F for practical use they areadj usted within the cylinder A in the manner shown in the drawings, andthe edges 0f the matching sections are made to overlap, as thereinshown. The lower ends of the said sections bear upon the ring H andagainst the fiange H4 upon the inner circumferential edge thereof, andthe upper edges of the sections are caused to bear against the innerface of the cylinder or wall, in this manner forming the completetire-pot.

The size of the sections is obviously not inaterial, as they can be madeof any size required to produce fire-pots adapted for stoves andfurnaces of different sizes.

In operation,the parts having been arranged in the relative positionshown in the drawings, and air being admitted into the duct under thedoorway through the inlet-tube L, as shown in Figs. l and 2, will passthrough the lower chamber or passage-way to the end thereof, and thenupward and backward in the second passage-way to its end, and from`thence upward again and into the top duct or passage-way, as indicatedby arrows, to be distributed therefrom to the fire through theperforations in the curved top portions of the sections B. The cold airthus admitted and eirculated will prevent the sections of the lire-potfrom becoming unduly heated and the heat radiated from them will heatthe air as lit circulates, so that it will be at a high temperature whenit is distributed by and discharged from the upper chamber, duct, orpassageway into the fire-pot to promote combustion of the fuel in the[ire-pot and of the gases freed by such combustion and of sootysubstances produced by such combustion.

Having thus fully described-our invention, what we claim, and desire tosecure by Letters Patent, is-

1. An improved fire-pot for stoves and furnaces comprising a series ofsections adapted to rest upon a fiat surface and project upward, saidsections being square ended at their lower end portions and perforatedand ICO IIO

curved outward at their upper ends and having outward extensions atdiierent points of elevation, the extensions and the top of the sectionsterminating in the same vertical planes and engaging the inside surfaceof the cylinder, forming communicating air-chambers which extendhorizontally, mating sections having integral side portions adapted toproduce a doorway and to close the ends of the upper air-chamber and toalso produce an air-chamber under the doorway communicating with thelowest horizontal air-chamber, a at ring supporting said sections, and acylinder engaging the outer edges of the upper portion of the sectionsand the hori zontal an'ges, and supporting said ring.

2. In ahrc-pot for furnaces, the section D having a vertical portion D2,a horizontal extension D3, and an inclined portion D4, the

FRANK MEYER. GEORGE HARMS. Witnesses:

HENRY MANsFInLD, CHAs. W. LA PORTE.

